Product Description
39
1.12.1.2 Wake-up Devices and Events
Table 15 lists the devices or specific events that can wake the computer from specific states.
Table 15. Wake-up Devices and Events
Devices/events that wake up the
system…
state
Power switch S3, S4, S5
1
RTC alarm S3, S4, S5
1
Monitor to remain in sleep state
LAN S3, S4, S5
1, 3
“S5 WOL after G3” must be supported;
monitor to remain in sleep state
USB S3, S4, S5
1, 2, 3
Wake S4, S5 controlled by BIOS option
(not after G3)
WAKE# S3, S4, S5
1
Via WAKE; monitor to remain in sleep
state
Notes:
1. S4 implies operating system support only.
2. Will not wake from Deep S4/S5. USB S4/S5 Power is controlled by BIOS. USB S5 wake is controlled by BIOS. USB S4
wake is controlled by OS driver, not just BIOS option.
3. Windows 8.1 Fast startup will block wake from LAN and USB from S5.
NOTE
The use of these wake-up events from an ACPI state requires an operating system that provides
full ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake
events.
1.12.2 Hardware Support
The board provides several power management hardware features, including:
• Wake from Power Button signal
• Instantly Available PC technology
• LAN wake capabilities
• Wake from USB (not after G3)
• WAKE# signal wake-up support
• Wake from S5
• +5 V Standby Power Indicator LED
NOTE
The use of Wake from USB from an ACPI state requires an operating system that provides full
ACPI support.
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